PyPI Package Registry Management Skill
Manage and analyze Python packages, PyPI publishing, and distribution builds.
MANDATORY: Discovery-First Pattern
Always check current package configuration and index settings before publishing.
Phase 1: Discovery
#!/bin/bash
echo "=== Package Configuration ==="
cat pyproject.toml 2>/dev/null | head -25
cat setup.py 2>/dev/null | head -20
cat setup.cfg 2>/dev/null | head -20
echo ""
echo "=== pip Configuration ==="
pip config list 2>/dev/null | head -10
echo ""
echo "=== Index Settings ==="
cat pip.conf 2>/dev/null || cat ~/.pip/pip.conf 2>/dev/null | head -10
Phase 2: Analysis
#!/bin/bash
echo "=== Installed Packages ==="
pip list --format=json 2>/dev/null | jq 'length' 2>/dev/null | xargs -I{} echo "Total installed: {}"
echo ""
echo "=== Outdated Packages ==="
pip list --outdated --format=json 2>/dev/null | jq '[.[:10][] | {
name: .name,
current: .version,
latest: .latest_version,
type: .latest_filetype
}]' 2>/dev/null
echo ""
echo "=== Package Info ==="
PACKAGE=$(cat pyproject.toml 2>/dev/null | grep '^name' | head -1 | sed 's/.*= *"//;s/"//')
curl -s "https://pypi.org/pypi/${PACKAGE}/json" 2>/dev/null | jq '{
name: .info.name,
version: .info.version,
downloads: .info.downloads,
requires_python: .info.requires_python
}' 2>/dev/null
Output Rules
- TOKEN EFFICIENCY: Target <=50 lines per output
- Summarize package metadata concisely
- List outdated dependencies with version gaps
- Never expose PyPI tokens in output
Common Operations
Build and Check Distribution
#!/bin/bash
echo "=== Build Distribution ==="
python -m build --sdist --wheel 2>&1 | tail -10
echo ""
echo "=== Check Distribution ==="
twine check dist/* 2>/dev/null | head -10
Package Lookup
#!/bin/bash
PACKAGE="${1:?Package name required}"
echo "=== PyPI Package: $PACKAGE ==="
curl -s "https://pypi.org/pypi/${PACKAGE}/json" | jq '{
name: .info.name,
version: .info.version,
summary: .info.summary,
license: .info.license,
requires_python: .info.requires_python,
releases: (.releases | keys | length)
}' 2>/dev/null
Safety Rules
- Never expose PyPI API tokens in configuration files or logs
- Use
twine checkbefore uploading to verify package metadata - Test on TestPyPI first before publishing to production PyPI
- Pin dependencies in requirements.txt for reproducible builds
Output Format
Present results as a structured report:
Managing Pypi Report
════════════════════
Resources discovered: [count]
Resource Status Key Metric Issues
──────────────────────────────────────────────
[name] [ok/warn] [value] [findings]
Summary: [total] resources | [ok] healthy | [warn] warnings | [crit] critical
Action Items: [list of prioritized findings]
Target ≤50 lines of output. Use tables for multi-resource comparisons.
Anti-Hallucination Rules
- NEVER assume resource names — always discover via CLI/API in Phase 1 before referencing in Phase 2.
- NEVER fabricate metric names or dimensions — verify against the service documentation or
--helpoutput. - NEVER mix CLI commands between service versions — confirm which version/API you are targeting.
- ALWAYS use the discovery → verify → analyze chain — every resource referenced must have been discovered first.
- ALWAYS handle empty results gracefully — an empty response is valid data, not an error to retry.
Counter-Rationalizations
| Shortcut | Counter | Why |
|---|---|---|
| "I'll skip discovery and check known resources" | Always run Phase 1 discovery first | Resource names change, new resources appear — assumed names cause errors |
| "The user only asked for a quick check" | Follow the full discovery → analysis flow | Quick checks miss critical issues; structured analysis catches silent failures |
| "Default configuration is probably fine" | Audit configuration explicitly | Defaults often leave logging, security, and optimization features disabled |
| "Metrics aren't needed for this" | Always check relevant metrics when available | API/CLI responses show current state; metrics reveal trends and intermittent issues |
| "I don't have access to that" | Try the command and report the actual error | Assumed permission failures prevent useful investigation; actual errors are informative |